| 摘要 |
PROBLEM TO BE SOLVED: To provide an echo suppression device capable of sufficiently suppressing an echo, even if a level of an audio signal representing the echo is so large that causing distortion.SOLUTION: An echo suppression device 6 includes: a suppression part 10 for generating a corrected audio signal by suppressing an echo signal which represents an echo, generated by an audio input part collecting reproduced sound signal reproduced by an audio output part; a distortion suppression gain determination part 13 for obtaining gain for attenuating the corrected audio signal according to the degree of echo signal distortion whose echo signal intensity changes in non-linear according to intensity change of the reproduced audio signal; and a distortion correction part 14 for suppressing the corrected audio signal according to the gain.SELECTED DRAWING: Figure 3 |
